Inventor · disambiguated record
Hirohisa Sano
Also filed as: SANO HIROHISA
27 granted patents·4 pending applications·667 citations·filing 1986–2022
97Inventor score
Top patents by PatentIndex Score
31 records- 0193US5515196AOptical intensity and phase modulators in an optical transmitter apparatusHITACHI LTD·Filed 1993·Granted May 7, 1996·158 cites·18 claims
- 0286US6965552B2Mounting method for optical device and optical head equipmentNICHIA CORP·Filed 2002·Granted Nov 15, 2005·22 cites·23 claims
- 0382US5574289ASemiconductor optical integrated device and light receiver using said deviceHITACHI LTD·Filed 1993·Granted Nov 12, 1996·60 cites·23 claims
- 0480US7292519B2Optical head with lasers and mirrors in a recess formed in a substrateHITACHI LTD·Filed 2005·Granted Nov 6, 2007·6 cites·2 claims
- 0580US6488416B1Optical module, board mounted optical module, and assembly method of optical moduleHITACHI LTD·Filed 2000·Granted Dec 3, 2002·22 cites·2 claims
- 0679US4822128AOptical fiber star coupler and method of manufacturing the sameHITACHI LTD·Filed 1986·Granted Apr 18, 1989·32 cites·11 claims
- 0777US4790614AOptical filter and optical device using sameHITACHI LTD·Filed 1986·Granted Dec 13, 1988·35 cites·17 claims
- 0874US6362905B1Optical crossconnect apparatus and optical transmission systemHITACHI LTD·Filed 1998·Granted Mar 26, 2002·36 cites·8 claims
- 0974US4904037AWaveguide type optical device with thermal compensation layersHITACHI LTD·Filed 1988·Granted Feb 27, 1990·32 cites·5 claims
- 1072US4756587AOptical multi/demultiplexerHITACHI LTD·Filed 1987·Granted Jul 12, 1988·29 cites·6 claims
- 1171US4909584AOptical multi/demultiplexer and optical module using the sameHITACHI LTD·Filed 1987·Granted Mar 20, 1990·34 cites·14 claims
- 1270US5339370AOptical modulator and optical communication system utilizing the sameHITACHI LTD·Filed 1993·Granted Aug 16, 1994·28 cites·25 claims
- 1369US5140453AOptical receiving method utilizing polarization diversity and apparatus for carrying out the sameHITACHI LTD·Filed 1988·Granted Aug 18, 1992·32 cites·13 claims
- 1467US6111998ASemiconductor optical device, fiber optical amplifier and optical transmission systemHITACHI LTD·Filed 1997·Granted Aug 29, 2000·35 cites·15 claims
- 1566US6868210B2Optical waveguide and their application of the optical communication systemHITACHI LTD·Filed 2003·Granted Mar 15, 2005·9 cites·20 claims
- 1665US12355301B2Stator for rotating electrical machine, rotating electrical machine, method for manufacturing stator for rotating electrical machine, and method for manufacturing rotating electrical machinePROTERIAL LTD·Filed 2020·Granted Jul 8, 2025·0 cites·8 claims
- 1764US6813445B2Optical crossconnect apparatus and optical transmission systemHITACHI LTD·Filed 2002·Granted Nov 2, 2004·6 cites·6 claims
- 1861US2023366054A1Heat treatment method for amorphous alloy ribbon and heat treatment apparatus for amorphous alloy ribbonPROTERIAL LTD·Filed 2021·Application pending·0 cites
- 1960US5710847ASemiconductor optical functional deviceHITACHI LTD·Filed 1996·Granted Jan 20, 1998·23 cites·13 claims
- 2056US2025167602A1Rotary electric machinePROTERIAL LTD·Filed 2022·Application pending·0 cites
- 2151US7289702B2Optical waveguide apparatusHITACHI CHEMICAL CO LTD·Filed 2003·Granted Oct 30, 2007·3 cites·17 claims
- 2251US5742423ASemiconductor optical modulatorHITACHI LTD·Filed 1995·Granted Apr 21, 1998·18 cites·29 claims
- 2351US5570439AOptical waveguide device and optical transmission systemHITACHI LTD·Filed 1994·Granted Oct 29, 1996·14 cites·4 claims
- 2449US6317230B1Optical cross-connect system and optical transmission systemHITACHI LTD·Filed 1998·Granted Nov 13, 2001·14 cites·15 claims
- 2547US7272314B2Optical crossconnect apparatus and optical transmission systemHITACHI LTD·Filed 2004·Granted Sep 18, 2007·0 cites·2 claims
- 2645US6782018B2Diode laser module and application equipmentHITACHI LITD·Filed 2002·Granted Aug 24, 2004·2 cites·11 claims
- 2743US2001033403A1Optical cross-connect system and optical transmission systemFiled 2001·Application pending·0 cites
- 2840US4953934AWaveguide type light merging and branching deviceHITACHI LTD·Filed 1988·Granted Sep 4, 1990·9 cites·2 claims
- 2933US2006077016A1Lumped element non-reciprocal circuit deviceSUGIYAMA YUTA·Filed 2005·Application pending·0 cites
- 3032US5763897ANon-uniform thickness or bandgap superlattice betweeen cladding layer and multi-quantum well structure of pin optical waveguideHITACHI LTD·Filed 1997·Granted Jun 9, 1998·3 cites·21 claims
- 3132US5422967ASelf-routing optical switch and optical switch arrayHITACHI LTD·Filed 1993·Granted Jun 6, 1995·5 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →